Wald was a member of the “Dror” movement. During the Great Uprising in the Warsaw Ghetto, he commanded a force in Toebbens-Shultz at 36 Leszno Street. He was in charge of the prison established by the Jewish Fighting Organization and for the execution of several traitors and collaborators. He was nicknamed “Tatale” (daddy) because of his short stature. Wald was killed in May 1943 while making his way out of a sewage pipe in the Polish sector. He was 23 years old when he died.